Lady GaGa has been fined Â£10,000 for over-running at her gig at the O2 arena in London, reports claim.

The 'Bad Romance' star - who reportedly caused controversy backstage last night - previously revealed that she does not care about personal riches.

A source told the Daily Star: "Lady GaGa was still doing her dress rehearsal at 7pm when the doors were supposed to be open and the first support act was due on.

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"She wouldn't finish rehearsing until she was happy. In the end she was 45 minutes late but refused to cut the set short. She told organisers she didnâ€™t care about the fine, all she cared about was putting on the best show for her 'little monsters'."